Product Resources

Features & Product Details

The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power in the mid to high RPM range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long primary/double secondary designs. A difference you will immediately notice in throttle response and the ability to hold more power higher into the revs.

Features include:
· Short Equal Length Primaries. The shortest possible length primaries you can have on an Equal Length header. Short means less header volume and quick spool up.
· Symmetrical Primary Design. All primaries have a similar tube length AND bend geometry. This keeps the pulse velocities high and consistent compared to equal length headers with different (non-symmetrical) primary tubing geometry.
· Smooth Mandrel Bends. All of the bends utilize a mandrel for smooth non-restrictive flow. Not only that, they use the largest bends possible at every location. It would be cheaper to use 2” bends everywhere, like others do, but that’s not going to give the best performance.
· Thick Walled 321 Stainless Steel Construction for Long Life. 321 is alloyed with titanium, costs more, a lot more, but it’s the ideal material for high temperature turbocharged applications. Would 304 stainless work, yes, but the temperatures on turbocharged cars can exceed the limits of 304 stainless enough to make them brittle and crack. 321 stainless steel has higher strength and toughness at elevated temperatures. It was developed by the aircraft industry specifically to address 304 stainless manifolds that were cracking. Killer B Motorsport is the only company that manufactures full 321 headers.
· High Heat Retention. 321 stainless steel conducts less heat than 304 stainless steel. The short primaries and properly sized secondary’s also pull less heat from the exhaust gasses increasing turbine efficiency. Large tubing headers expose the exhaust gasses to more surface area transmitting more heat and reducing exhaust energy. You can also ceramic coat or wrap the headers (and keep the warranty) without exceeding the temperature range like you can with 304 stainless.
· V-Band Up-Pipe Connection. Why V-Band? Fast, easy, no gasket, no leaks, perfectly concentric alignment of tubes for no disruption of flow, what’s not to like!
· External Waste Gate Up-Pipe included. Of course it comes with an Up-Pipe! This header was designed as a complete system. Using other up-pipes would only compromise performance, and nobody wants that.
· Weighs only 17 pounds (vs. OEM weighs 25 pounds)
· Works with OEM EJ25 Oil Pans, and Killer B Motorsport Performance Aluminum Oil Pan!
· Made in the USA and Killer B quality!

<p><strong>Note: May not fit some Forester, Outback, and Legacy models with the OEM oil pan and cooler.</strong></p>

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.

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REVIEWS & CUSTOMER MEDIA

4PeaksSubi
Best headers on the market, they look amazing and personally love the sound. Much quieter at idle/cruising which is a wife-saver, but they really rip when you open it up. Feels much smoother between gear shifts than the stock headers did.
2011 WRX with a built engine, dom 1.5 10cm 92 oct making 392whp at 20psi (on a dyno-dynamics roller).

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Killer B EWG 3 years ago

5out of
5stars

balbano199552986
These headers are beautiful. Great packaging from RSD to ensure safe delivery.

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10 of 10 people found the following review helpful

Up pipe failed 3 years ago

2out of
5stars

K. L.
Ordered and installed the holy header under a year ago, everything was great until about 3 weeks ago when I noticed something was a miss with the car. Spent every weekend trying to diagnose the issue until I finally made my way to the uppipe. Needless to say a huge crack in the pipe at the EWG pipe weld location will cause a major issue.
Contacted Krystal at killer b, and she seems less than happy to talk to me about this issue but said they will repair it and send it back. Dont know how i feel about that. Maybe when they fix their email server and look at these pics they will change their mind.

Shipping Policy

TURNAROUND TIME

Items listed as "24 hours" or "Ships same day" will ship the same day if placed on a weekday before 2PM MST / 4PM EST when shipping via UPS.
Items listed differently typically ship by the estimated ship date listed on the product page. These estimated dates are not guaranteed and are subject to change periodically. Our customer service representatives monitor backorders on a daily basis to ensure your order ships as soon as possible. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time.

FREE SHIPPING

Free shipping is available within the lower 48 states for orders totaling $200 or more. Simply select the free shipping option during checkout. Even though expedited shipping is not free we will still discount the free shipping option from the expedited shipping cost for you. This offer excludes shipments going to Alaska, Hawaii, Military Boxes, and items too large to ship via UPS or USPS. These items are usually large freight or bulky items such as engine blocks, etc.